I completely agree. At first, I was frustrated with Myoboku Trial, but I took a turn and like it. So please, listen to this post and turn it weekendly. Ninja Puzzle is a bit tad boring.
In case none of you checked out what they have on the China server, on the weekends, Myoboku trial gets moved to the weekend missions. There are some weekends where the trial appears, some that don't, and some weekends where the trial and puzzles both appear. The puzzles do get a update with different puzzles than we have and the rewards are different (this is dependent if China didn't change the rewards to begin with).